443890-92-4Relevant academic research and scientific papers
Dithienylethenes with a novel photochromic performance
Morimitsu, Kentaro,Shibata, Katsunori,Kobatake, Seiya,Irie, Masahiro
, p. 4574 - 4578 (2007/10/03)
Dithienylethenes with low decoloration quantum yields and thermal reversibility at high temperature above 100°C were prepared. Introduction of bulky alkoxy substituents at 2- and 2′-positions of the thiophene rings strongly suppressed the cycloreversion quantum yields. The quantum yields were lower than 10-3, and the photogenerated color remained stable enough under room light. On the other hand, the bulky alkoxy substituent decreased the thermal stability of the colored closed-ring isomers at high temperature. The color of the dithienylethene with cyclohexyloxy substituents faded out in less than 1 min at 160°C.
